Connect pool room to controlled residential ventilation? Chlorinated water? Condensation?

How do you want to keep the pool room warm if you're blowing the air out every few minutes?

If the pool were in use for several hours a day, that certainly wouldn't work.

With only one use per day, all the warm air is just blown out once a day. It's common in many houses to completely ventilate once in the morning. And here it's only about the air of one room, not an entire house.

The air is then replaced by air coming from the rest of the house. The resulting negative pressure will balance out over time as the house's controlled ventilation system supplies more air than it exhausts due to the slight negative pressure. This somewhat reduces the heat recovery efficiency of the controlled ventilation system, but oh well. Yes, overall heat is lost, which needs to be compensated. However, with our ground source heat pump, we can cheaply "top up" the heat.